Musculus rectus abdominis

Origin:

• 5.–7. ribs;
• xiphoid process.

Rectus abdominis

Insertion: pubic bone between symphysis and tuberculum pubicum.

Innervation:

• nervus intercostalis (7.–11.);
• nervus subcostalis.

Function:

• bends the spine (ventral flexion)
• changes the tilt of the pelvis,
• participates in the abdominal press;
• accessory expiratory muscle.

Formations on the rectus abdominis muscle:

• tendinous intersection: three transverse tendinous bands crossing the muscle;
• rectus sheath: tendon sheath surrounding the muscle
• linea alba: fibrous band in the middle (vertically) of the muscle.

Links

References

• ČIHÁK, Radomír. Anatomie 1. 2. edition. Grada, 2001. 497 pp. ISBN 80-7169-970-5.